app makefile: include makefile of library

Author: bradjc

AppMakefile.mk

@@ -49,6 +49,7 @@ EXTERN_LIB_NAME_$(notdir $(1)) := $(notdir $(1))
 
 # If this library has any additional rules, add them
 -include $(1)/Makefile.app
+-include $(1)/Makefile
 
 # If this library has an include directory, add it to search path
 ifneq "$$(wildcard $(1)/include)" ""